Currently, there is no event in FlexSheet which is raised when the value of dependent cell changes.However you may maintain a dictionary of cellDependencies and then in cellEditEvent, check if the edited cell has any dependent cell and if a dependent cell is present then raise a custom event indicating value change in the dependent cell.Please refer to the following cell which implements the same:-https://stackblitz.com/edit/angular-3f1jmc?file=app%2Fapp.component.ts